Cheong, Ying-Wai and Rigolet, Severinne and Daou, T. Jean and Wong, Ka-Lun and Ling, Tau Chuan and Ng, Eng-Poh (2020) Crystal growth study of nanosized K-MER zeolite from bamboo leaves ash and its catalytic behaviour in Knoevenagel condensation of benzaldehyde with ethyl cyanoacetate. Materials Chemistry And Physics, 251. ISSN 02540584, DOI https://doi.org/10.1016/j.matchemphys.2020.123100.
Full text not available from this repository.Abstract
A detailed study on the formation of nanosized K-MER zeolite from a template-free hydrogel system is reported. By using a new recipe and bamboo leave ash (BLA) as a reactive silica source, the K-MER zeolite crystallization time has been shortened from 15 days to 6 h at 180 degrees C, enabling the investigation of induction, nucleation and crystal growth of nanoscale K-MER zeolite using spectroscopy and microscopy techniques. The resulting zeolite nanorods ((45.1 +/- 14.5 nm length) x (3.9 +/- 1.9 nm width)) have a Si/Al ratio of 2.31 and they tend to assemble in parallel forming bulkier bundle-like secondary structure ((728 +/- 171 nm length) x (251 +/- 49 nm width). The nanocrystals (84.3% conversion and yield, 100% selective to ethyl 2-cyano-3-phenylacrylate (ECP)) show better catalytic performance than other homogeneous base catalysts (92-99% conversion, 82-84% yield) in Knoevenagel reaction of benzaldehyde and ethyl cyanoacetate under non-microwave instant heating condition, thus offering an eco-friendly approach for synthesizing highly selective solid base catalyst for synthesizing pure fine chemicals.
| Item Type: | Article |
|---|---|
| Funders: | FRGS (Grant No. 203/PKIMIA/6711642), USM Bridging (Grant No. 304/PKIMIA/6316506), University of Southern Maine |
| Uncontrolled Keywords: | Zeolite K-MER nanorods; Bamboo leaves silica ash; Nucleation and crystal growth; Template-free synthesis; Knoevenagel condensation |
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Institute of Biological Sciences |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 30 Dec 2023 01:08 |
| Last Modified: | 30 Dec 2023 01:08 |
| URI: | http://eprints.um.edu.my/id/eprint/36424 |
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